Almost all of them have European surnames, but only ~20% of them have a European ancestor. If you are white, chances are good one of your ancestors came from France, or used a French surname to fool the authorities.
1 AC, or alternating current means the electrical current is alternating directions in a repetitive pattern.  AC is created by generators in power plants, and other sources. This AC current is delivered to our homes and businesses by the power lines we see everywhere.
Alternating current is used for long distance transmission because power loss is less that is why the electric current provided in our houses is Alternating current. In direct current the loss of energy is high so it cannot be used for long distance transmission. Rate of recurrence: The frequency of Alternating current varies from country to country. But normally it ranges from 50 Hz to 60 Hz. Frequency of Direct current is persistent. And it shows no variation. Difference between Alternating Current and Direct Current - ResearchPedia.Info. Variation in direction: Alternating current changes its direction in inverse manner. Direct Current streams in only ...